CN116568943A - Impact energy absorbing assembly - Google Patents
Impact energy absorbing assembly Download PDFInfo
- Publication number
- CN116568943A CN116568943A CN202180082183.4A CN202180082183A CN116568943A CN 116568943 A CN116568943 A CN 116568943A CN 202180082183 A CN202180082183 A CN 202180082183A CN 116568943 A CN116568943 A CN 116568943A
- Authority
- CN
- China
- Prior art keywords
- insert
- plastic material
- assembly
- plastic
- slot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 44
- 229920003023 plastic Polymers 0.000 claims abstract description 37
- 239000004033 plastic Substances 0.000 claims abstract description 37
- 239000002131 composite material Substances 0.000 claims abstract description 16
- 239000012763 reinforcing filler Substances 0.000 claims abstract description 7
- 238000003856 thermoforming Methods 0.000 claims abstract description 3
- 238000003466 welding Methods 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 239000004743 Polypropylene Substances 0.000 description 7
- 239000000945 filler Substances 0.000 description 7
- 239000004417 polycarbonate Substances 0.000 description 7
- 229920000515 polycarbonate Polymers 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 7
- 239000004952 Polyamide Substances 0.000 description 6
- 229920001903 high density polyethylene Polymers 0.000 description 6
- 239000004700 high-density polyethylene Substances 0.000 description 6
- 229920002647 polyamide Polymers 0.000 description 6
- 229920001707 polybutylene terephthalate Polymers 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- 229920006778 PC/PBT Polymers 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/03—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/003—One-shot shock absorbers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/124—Vibration-dampers; Shock-absorbers using plastic deformation of members characterised by their special construction from fibre-reinforced plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3044—Bumpers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0241—Fibre-reinforced plastics [FRP]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
- F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
- F16F2226/042—Gluing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
- F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
- F16F2226/048—Welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2236/00—Mode of stressing of basic spring or damper elements or devices incorporating such elements
- F16F2236/04—Compression
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vibration Dampers (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to an assembly (10) for absorbing impact energy, comprising a bumper beam and at least one energy absorbing device (1) interposed between the bumper beam (2) and a side member (3) of a motor vehicle, also called crash box, comprising a body comprising a plastic material and at least one insert (12) made of a composite material comprising a plastic material and reinforcing filler embedded in the plastic material of the insert, the plastic body and the composite insert being connected, in particular by welding, bonding, thermoforming, the insert comprising mechanically weakened areas (15) arranged to assist in initiating the breakage of the absorbing device.
Description
Technical Field
The present invention relates to an assembly for absorbing impact energy, which assembly is adapted to provide protection in the event of an impact, in particular a frontal impact, on a motor vehicle.
Background
In order to absorb impacts, in particular frontal impacts, on the bumper beams of motor vehicles, it is known to use energy absorbing devices which deform as a result of the forces exerted by the impacts. Due to the strength of metallic materials, these energy absorbing devices are typically made of metallic materials. However, these metallic energy absorbing devices are heavy and do not conform to the development of motor vehicles, which are intended to become lighter and lighter.
Disclosure of Invention
In particular, the present invention aims to improve an assembly for absorbing impact energy, suitable for providing protection in the event of an impact, in particular a frontal impact, on a motor vehicle.
Accordingly, one subject of the present invention is an assembly for absorbing impact energy, comprising a bumper beam and at least one energy absorbing device interposed between the bumper beam and a side rail of a motor vehicle, also called crash box, comprising a body comprising a plastic material and at least one insert made of a composite material comprising a plastic material and a reinforcing filler embedded in the plastic material of said insert.
For example, the plastic body and the composite insert are joined, in particular by being over-molded with the same or compatible materials.
The insert preferably comprises a mechanically weakened region arranged to facilitate the onset of fracture of the energy absorbing device.
The invention thus makes it possible to absorb the maximum amount of impact energy during the entire collision, in particular in the event of a frontal collision, in such a way that the vehicle parts behind the bumper are not damaged, without thereby reaching a force peak. Therefore, in the event of an accident or collision, the maintenance cost can be reduced.
By acting as a fracture initiator, the presence of this weakened region may avoid/reduce force peaks that may occur during an unexpected crash event.
The implementation of the invention does not require any additional costs and can be easily performed in a production plant.
According to one aspect of the invention, the weakened area in the insert includes a slot formed in the insert.
According to one aspect of the invention, the slot is empty. In other words, the slot corresponds to a hole in the insert.
According to one aspect of the invention, the slot receives a filler material, in particular a plastic material.
For example, the filler material is the same as the material used for overmolding, and is particularly compatible with the composite material. For example, the material is PP, PA6, PC or PBT.
According to one aspect of the invention, the filler material is different from the material used for the remainder of the insert.
According to one aspect of the invention, the filler material has a thickness less than the thickness of the insert.
According to one aspect of the invention, the slot has any circular, polygonal or curved shape.
According to one aspect of the invention, each insert has a single weakened area.
As a variant, each insert has a plurality of weakened areas, in particular a plurality of slots.
For example, the slot has an elongated shape.
According to one aspect of the invention, the insert is formed from a sheet of composite material.
According to one aspect of the invention, the reinforcing filler portion of the insert comprises glass fibers.
According to one aspect of the invention, the filling material of the slot may be the same as the plastic material of the body.
According to one aspect of the invention, the body comprises stiffening ribs, in particular formed by moulding the plastic material.
According to one aspect of the invention, a plurality of inserts are provided on the body.
According to one aspect of the invention, the number of inserts on each body is selected to be 2 to 10, such as 2 to 6, such as 6.
As a variant, a single insert is provided on each body.
According to one aspect of the invention, each insert is arranged between two stiffening ribs of the body.
According to one aspect of the invention, one or more inserts are arranged on a surface of the body of the energy absorbing device.
According to one aspect of the invention, the body has a peripheral portion and the insert extends over only a portion of the peripheral portion. In other words, the insert is not a rolled strip with both ends joined together.
Another subject of the invention is an energy absorbing device comprising a body comprising a plastic material and at least one insert made of a composite material comprising a plastic material and a reinforcing filler embedded in the plastic material of the insert, the plastic body and the composite insert being joined, in particular by welding, bonding or thermoforming.
The plastic material may be polypropylene (PP), high Density Polyethylene (HDPE), polyamide (PA), polycarbonate/polybutylene terephthalate (PC/PBT) alloy, polycarbonate (PC), acrylate, polyurethane or Thermoplastic (TPU).
Drawings
Other features, details and advantages of the invention will become more apparent from the detailed description given below, with reference to the accompanying schematic drawings, given by way of non-limiting illustration of several exemplary embodiments, in which:
figure 1 is a schematic diagram of an assembly according to one example of the invention,
fig. 2 shows schematically and partly a detail of the assembly according to fig. 1.
Detailed Description
The motor vehicle is usually equipped with a bumper beam 2 arranged on the front side. As shown in fig. 1, the bumper beam 2 may be attached to two side rails 3 of a vehicle. In order to absorb the impact and prevent the energy from the impact from being transferred directly to the side rail 3 and the rest of the vehicle, the bumper beam 2 is attached to the energy absorbing device 1, the energy absorbing device 1 connects the bumper beam 2 with the end of the side rail 3 facing said bumper beam 2.
Fig. 1 shows an assembly 10 for absorbing impact energy, comprising a bumper beam 2 and two energy absorbing devices 1 located at two positions on the bumper beam 2, each energy absorbing device 1 being interposed between the bumper beam 2 and an associated side rail 3.
Each energy absorbing device 1, also called crash box, comprises a body 11 comprising a plastic material and an insert 12 made of a composite material comprising a plastic material and reinforcing filler embedded in the plastic material of the insert.
For example, the insert 12 comprises carbon fibers and/or glass fibers, the reinforcing material being incorporated into the plastic material. The plastic material may be polypropylene (PP), high Density Polyethylene (HDPE), polyamide (PA), polycarbonate/polybutylene terephthalate (PC/PBT) alloy, polycarbonate (PC), acrylate, polyurethane or Thermoplastic (TPU).
The insert 12 is formed from sheet material.
The body 11 is made of a plastic material, which may be polypropylene (PP), high Density Polyethylene (HDPE), polyamide (PA), polycarbonate/polybutylene terephthalate (PC/PBT) alloy, polycarbonate (PC), acrylate, polyurethane or Thermoplastic (TPU).
The plastic body 11 is over-molded onto the insert 12. The plastic used for the overmolding is of the same nature or chemical compatibility as the resin of the composite material of the immersed insert, ensuring a strong bond between the body 11 and the insert 12.
The main body 11 comprises a mounting plate 13, the mounting plate 13 being formed in one piece with the rest of the main body 11 for attachment to the side rail 3. The mounting plate 13 comprises holes 14 for attachment means, such as screws, for attachment to the side rail 3.
Each insert 12 comprises one or more mechanically weakened areas 15 arranged to promote the onset of fracture of the energy absorbing device 1.
Each weakened region 15 in the insert includes a slot 16 formed in the insert.
In the example described, the slots 16 in the region 15 are empty. In other words, each slot 16 corresponds to a hole in the insert.
In one variation, the slot 16 receives a filler material, particularly a plastic material.
The filler material is different from the material used for the remainder of the insert 12.
The thickness of the filler material is less than the thickness of the insert 12.
Each slot 16 has any circular, polygonal or curved shape.
One of these inserts may have a single weakened area 15 or multiple weakened areas 15, the multiple weakened areas 15 thus being formed by multiple slots. The number may be two, three or more.
The insert 12 visible in fig. 2 comprises only one weakened area 15.
For example, the slot 16 has an elongated shape.
Each insert 12 is formed from a sheet of composite material.
Each body 11 includes a reinforcing rib 19 formed by molding a plastic material. These ribs 19 may be arranged in a cross or other pattern.
The number of inserts on each body is selected to be 2 to 10, such as 2 to 6, such as 6.
For example, each insert 12 is arranged between two stiffening ribs 19 of the body 11, as can be seen for example in fig. 2.
Each insert 12 is arranged on the surface of the body 11 of the energy absorbing device, bearing on a rib 19 located below the insert 12.
The plastic body 11 has a peripheral portion 18, with each insert 12 extending over only a portion of this peripheral portion 18. In other words, the insert 12 is not a rolled strip with both ends joined together.
The inserts 12 may all be identical or, in a variation, the inserts 12 may be different such that the inserts 12 have different shapes, alternatively, the inserts of the plurality of weakened areas are different from each other.
Claims (10)
1. An assembly (10) for absorbing impact energy, comprising a bumper beam and at least one energy absorbing device (1) interposed between the bumper beam (2) and a side rail (3) of a motor vehicle, also called a crash box, comprising a body comprising a plastic material and at least one insert (12) made of a composite material comprising a plastic material and a reinforcing filler embedded in the plastic material of the insert, the plastic body and the composite insert being joined, the insert comprising a mechanically weakened area (15) arranged to promote the start of the breakage of the absorbing device.
2. Assembly according to claim 1, wherein the weakened area (15) in the insert comprises a slot (16) formed on the insert.
3. The assembly of claim 2, wherein the slot (16) is empty.
4. Assembly according to claim 2, wherein the slot (16) receives a filling material, in particular a plastic material.
5. The assembly of any of claims 2 to 4, wherein the slot (16) has any circular, polygonal or curved shape.
6. The assembly of any preceding claim, wherein the insert is formed from a sheet of composite material.
7. Assembly according to any one of the preceding claims, wherein the body comprises stiffening ribs (19), in particular formed by moulding the plastic material.
8. An assembly according to any preceding claim, wherein a plurality of inserts are provided on the body.
9. An assembly according to any preceding claim, wherein the body has a peripheral portion and the insert extends over only a portion of the peripheral portion.
10. An energy absorbing device comprising a body and at least one insert, the body comprising a plastic material, the insert being made of a composite material comprising a plastic material and a reinforcing filler embedded in the plastic material of the insert, the plastic body and the composite insert being joined, in particular by welding, bonding or thermoforming.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2013010A FR3117428B1 (en) | 2020-12-10 | 2020-12-10 | Shock energy absorber assembly |
| FRFR2013010 | 2020-12-10 | ||
| PCT/EP2021/084292 WO2022122601A1 (en) | 2020-12-10 | 2021-12-03 | Assembly for absorbing impact energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116568943A true CN116568943A (en) | 2023-08-08 |
Family
ID=74347397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180082183.4A Pending CN116568943A (en) | 2020-12-10 | 2021-12-03 | Impact energy absorbing assembly |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240034259A1 (en) |
| EP (1) | EP4259490A1 (en) |
| JP (1) | JP2023553627A (en) |
| CN (1) | CN116568943A (en) |
| FR (1) | FR3117428B1 (en) |
| WO (1) | WO2022122601A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2842152B1 (en) * | 2002-07-15 | 2005-02-11 | Peugeot Citroen Automobiles Sa | BUMPER REINFORCEMENT WITH PERFECTLY IMPACT ABSORBER ELEMENTS |
| DE102006058604B4 (en) * | 2006-12-11 | 2008-11-27 | Benteler Automobiltechnik Gmbh | crash box |
| US7918493B2 (en) * | 2008-08-08 | 2011-04-05 | Mazda Motor Corporation | Impact energy absorber and fabrication method thereof |
| DE102012015990A1 (en) * | 2012-08-11 | 2014-02-13 | Volkswagen Ag | Deformation element used as bumper assembly of motor vehicle, is provided between cross element and supporting structure whose block dimension is deformed during crash, by degradation of impact forces applied on supporting structure |
-
2020
- 2020-12-10 FR FR2013010A patent/FR3117428B1/en active Active
-
2021
- 2021-12-03 US US18/257,012 patent/US20240034259A1/en active Pending
- 2021-12-03 EP EP21823888.9A patent/EP4259490A1/en active Pending
- 2021-12-03 JP JP2023535560A patent/JP2023553627A/en active Pending
- 2021-12-03 WO PCT/EP2021/084292 patent/WO2022122601A1/en active Application Filing
- 2021-12-03 CN CN202180082183.4A patent/CN116568943A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP4259490A1 (en) | 2023-10-18 |
| FR3117428B1 (en) | 2023-03-10 |
| WO2022122601A1 (en) | 2022-06-16 |
| FR3117428A1 (en) | 2022-06-17 |
| JP2023553627A (en) | 2023-12-25 |
| US20240034259A1 (en) | 2024-02-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |